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UkoKoshka [18]
3 years ago
11

In ms.smiths calss 75% of the students are girls.there are 18 girls in the class.what is the total number of students in ms.smit

hs class?
Mathematics
2 answers:
sp2606 [1]3 years ago
7 0
75% of students = 18

Divide by 3 to find 25% of students.

25% of students = 6

Add the two together or multiply the 25% of students by 4 to get the total number of students.

25% + 75% = 6 + 18 = 24 students

or

25%*4 = 6*4 = 24 students
Ber [7]3 years ago
5 0

Answer:

78% of students is 18

Step-by-step explanation:

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Therefore, the probability of selected 4 red balls consecutively without replacement is 5/42. 

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Novosadov [1.4K]
• So we know that.....

x represent bags of snack and y is bottles of water.


This equations shows the total amount and the cost of each water bottle and snack:

20.00 = 2.50x + 1.00y

Total: $20.00
Snack: $2.50
Water Bottle: $1.00


And this question shows the total items:

11 = x + y

Which there will be some snack + some water bottle = 11 items


—————————————————————

• Now I’m going to first solve for x, which is the amount of bags of snack.

I will use the equation, 11 = x + y.

(First, we’ll subtract y from both side, since we’re solving for x [UNDO])

11 = x + y
-y = - y
_______
11 - y = x —> so x is equal to 11 minus y.


—————————————————————

• Now we’re going to plug the 11 - y as x in the equation: 20.00 = 2.50x + 1.00y to solve for y.

20.00 = 2.50 (11 - y) + 1.00y

20.00 = 27.5 - 2.50y + 1.00y (Distributed)

20.00 = 27.5 - 1.50y (Combine like terms)

20.00 = 27.5 - 1.50y
-27.5 = -27.5 (Subtract -27.5 both side)
——————————
-7.5 = - 1.50y


-7.5 = -1.50y
—— ——— (Divide both side by -1.50)
- 1.50 = -1.50

5 = y

y is equals to 5, which means that there are 5 water bottles.


Now we know there are 11 items total and because there are 5 water bottles, there will be 6 bags of snacks. 11-5=6

—————————————————————

ANSWER:

They bought 6 bags of snacks! :)
4 0
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